20020121219 has 16 divisors (see below), whose sum is σ = 23917897728. Its totient is φ = 16384470432.

The previous prime is 20020121197. The next prime is 20020121221. The reversal of 20020121219 is 91212102002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020121219 - 2¹² = 20020117123 is a prime.

It is a super-2 number, since 2×20020121219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20020121219.

It is not an unprimeable number, because it can be changed into a prime (20020121119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21947 + ... + 201300.

It is an arithmetic number, because the mean of its divisors is an integer number (1494868608).

Almost surely, 2^20020121219 is an apocalyptic number.

20020121219 is a deficient number, since it is larger than the sum of its proper divisors (3897776509).

20020121219 is a wasteful number, since it uses less digits than its factorization.

20020121219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223834.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20020121219 in words is "twenty billion, twenty million, one hundred twenty-one thousand, two hundred nineteen".